<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>localStorage</title>
</head>
<body>
<h2>localStorage</h2>
<button onclick="saveData()">点我保存一个数据</button>
<button onclick="readData()">点我读取一个数据</button>
<button onclick="deleteData()">点我删除一个数据</button>
<button onclick="deleteAllData()">点我清空一个数据</button>


<script>
    const p = {name: '张三', age: 18}

    function saveData() {
        localStorage.setItem('name', '张三')
        localStorage.setItem('age', 18)
        localStorage.setItem('person', JSON.stringify(p))  // 将对象转换成字符串的形式
    }

    function readData() {
        console.log(localStorage.getItem('name'))
        console.log(localStorage.getItem('age'))
        console.log(JSON.parse(localStorage.getItem('person')))  // 将字符串转换成对象的形式
    }

    function deleteData() {
        localStorage.removeItem('name')
    }

    function deleteAllData() {
        localStorage.clear()  // 清空
    }
</script>
</body>
</html>